From: Felix Fietkau Date: Tue, 29 Nov 2016 16:55:41 +0000 (+0100) Subject: kernel: backport some upstream at803x fixes X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=06a21e12ee94f43eebaabad5bad60c1120d723f9;p=openwrt%2Fstaging%2Flinusw.git kernel: backport some upstream at803x fixes Signed-off-by: Felix Fietkau --- diff --git a/target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch b/target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch new file mode 100644 index 0000000000..91c2334e55 --- /dev/null +++ b/target/linux/generic/patches-4.4/736-at803x-fix-reset-handling.patch @@ -0,0 +1,43 @@ +From: Sergei Shtylyov +Date: Wed, 23 Mar 2016 00:44:40 +0300 +Subject: [PATCH] at803x: fix reset handling +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The driver of course "knows" that the chip's reset signal is active low, +so it drives the GPIO to 0 to reset the PHY and to 1 otherwise; however +all this will only work iff the GPIO is specified as active-high in the +device tree! I think both the driver and the device trees (if there are +any -- I was unable to find them) need to be fixed in this case... + +Fixes: 13a56b449325 ("net: phy: at803x: Add support for hardware reset") +Signed-off-by: Sergei Shtylyov +Acked-by: Uwe Kleine-König +Signed-off-by: David S. Miller +--- + +--- a/drivers/net/phy/at803x.c ++++ b/drivers/net/phy/at803x.c +@@ -250,7 +250,7 @@ static int at803x_probe(struct phy_devic + if (!priv) + return -ENOMEM; + +- gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); ++ gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_reset)) + return PTR_ERR(gpiod_reset); + +@@ -377,10 +377,10 @@ static void at803x_link_change_notify(st + + at803x_context_save(phydev, &context); + +- gpiod_set_value(priv->gpiod_reset, 0); +- msleep(1); + gpiod_set_value(priv->gpiod_reset, 1); + msleep(1); ++ gpiod_set_value(priv->gpiod_reset, 0); ++ msleep(1); + + at803x_context_restore(phydev, &context); + diff --git a/target/linux/generic/patches-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch b/target/linux/generic/patches-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch new file mode 100644 index 0000000000..b30ba7aaae --- /dev/null +++ b/target/linux/generic/patches-4.4/737-net-phy-at803x-Request-reset-GPIO-only-for-AT8030-PH.patch @@ -0,0 +1,42 @@ +From: Sebastian Frias +Date: Wed, 23 Mar 2016 11:49:09 +0100 +Subject: [PATCH] net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY + +This removes the dependency on GPIOLIB for non faulty PHYs. + +Indeed, without this patch, if GPIOLIB is not selected +devm_gpiod_get_optional() will return -ENOSYS and the driver probe +call will fail, regardless of the actual PHY hardware. + +Out of the 3 PHYs supported by this driver (AT8030, AT8031, AT8035), +only AT8030 presents the issues that commit 13a56b449325 ("net: phy: +at803x: Add support for hardware reset") attempts to work-around by +using a 'reset' GPIO line. + +Hence, only AT8030 should depend on GPIOLIB operating properly. + +Fixes: 13a56b449325 ("net: phy: at803x: Add support for hardware reset") + +Signed-off-by: Sebastian Frias +Signed-off-by: David S. Miller +--- + +--- a/drivers/net/phy/at803x.c ++++ b/drivers/net/phy/at803x.c +@@ -250,12 +250,16 @@ static int at803x_probe(struct phy_devic + if (!priv) + return -ENOMEM; + ++ if (phydev->drv->phy_id != ATH8030_PHY_ID) ++ goto does_not_require_reset_workaround; ++ + gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_reset)) + return PTR_ERR(gpiod_reset); + + priv->gpiod_reset = gpiod_reset; + ++does_not_require_reset_workaround: + phydev->priv = priv; + + return 0; diff --git a/target/linux/generic/patches-4.4/738-net-phy-at803x-only-the-AT8030-needs-a-hardware-rese.patch b/target/linux/generic/patches-4.4/738-net-phy-at803x-only-the-AT8030-needs-a-hardware-rese.patch new file mode 100644 index 0000000000..c49d53ee1c --- /dev/null +++ b/target/linux/generic/patches-4.4/738-net-phy-at803x-only-the-AT8030-needs-a-hardware-rese.patch @@ -0,0 +1,77 @@ +From: Timur Tabi +Date: Tue, 26 Apr 2016 12:44:18 -0500 +Subject: [PATCH] net: phy: at803x: only the AT8030 needs a hardware reset on + link change + +Commit 13a56b44 ("at803x: Add support for hardware reset") added a +work-around for a hardware bug on the AT8030. However, the work-around +was being called for all 803x PHYs, even those that don't need it. +Function at803x_link_change_notify() checks to make sure that it only +resets the PHY on the 8030, but it makes more sense to not call that +function at all if it isn't needed. + +Signed-off-by: Timur Tabi +Reviewed-by: Florian Fainelli +Signed-off-by: David S. Miller +--- + +--- a/drivers/net/phy/at803x.c ++++ b/drivers/net/phy/at803x.c +@@ -374,27 +374,25 @@ static void at803x_link_change_notify(st + * in the FIFO. In such cases, the FIFO enters an error mode it + * cannot recover from by software. + */ +- if (phydev->drv->phy_id == ATH8030_PHY_ID) { +- if (phydev->state == PHY_NOLINK) { +- if (priv->gpiod_reset && !priv->phy_reset) { +- struct at803x_context context; ++ if (phydev->state == PHY_NOLINK) { ++ if (priv->gpiod_reset && !priv->phy_reset) { ++ struct at803x_context context; + +- at803x_context_save(phydev, &context); ++ at803x_context_save(phydev, &context); + +- gpiod_set_value(priv->gpiod_reset, 1); +- msleep(1); +- gpiod_set_value(priv->gpiod_reset, 0); +- msleep(1); ++ gpiod_set_value(priv->gpiod_reset, 1); ++ msleep(1); ++ gpiod_set_value(priv->gpiod_reset, 0); ++ msleep(1); + +- at803x_context_restore(phydev, &context); ++ at803x_context_restore(phydev, &context); + +- dev_dbg(&phydev->dev, "%s(): phy was reset\n", +- __func__); +- priv->phy_reset = true; +- } +- } else { +- priv->phy_reset = false; ++ dev_dbg(&phydev->dev, "%s(): phy was reset\n", ++ __func__); ++ priv->phy_reset = true; + } ++ } else { ++ priv->phy_reset = false; + } + if (pdata && pdata->fixup_rgmii_tx_delay && + phydev->speed != priv->prev_speed) { +@@ -426,7 +424,6 @@ static struct phy_driver at803x_driver[] + .phy_id_mask = AT803X_PHY_ID_MASK, + .probe = at803x_probe, + .config_init = at803x_config_init, +- .link_change_notify = at803x_link_change_notify, + .set_wol = at803x_set_wol, + .get_wol = at803x_get_wol, + .suspend = at803x_suspend, +@@ -468,7 +465,6 @@ static struct phy_driver at803x_driver[] + .phy_id_mask = AT803X_PHY_ID_MASK, + .probe = at803x_probe, + .config_init = at803x_config_init, +- .link_change_notify = at803x_link_change_notify, + .set_wol = at803x_set_wol, + .get_wol = at803x_get_wol, + .suspend = at803x_suspend,